This work was first published in 1929 and reprinted in 1931, 1932 and 1934. The new edition has witnessed extensive advances in the field of bacteriology and immunity, which the authors have observed and duly incorporated in their text. They call attention to the fact that they deal with infective diseases of animals rather more fully than in most medical works. Originally published in two volumes, the material is now published in a single volume which is somewhat unwieldy, but apparently the majority of the critics of the first edition felt that a one volume work was more usable than a two volume work. The book is extensive, profound, well annotated and unquestionably a useful textbook in the field that it concerns.